/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertDataStoreMessages.h
IConcertClientDataStore::FetchOrAdd()methods.
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FConcertDataStore_FetchOrAddRequest : public [FConcertDataStore_Request](API\Plugins\ConcertSyncCore\FConcertDataStore_Request)
FConcertSession...
SerializedValue
The property value to add if it doesn't already exist, in its serialized form.